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Why is base population important in calculating population growth?

Answer and explanation

Correct answer: Because percentage growth depends on the base number

Direct answer: A is correct. The base population is the starting population against which a later population is compared. First calculate the change: later population minus base population. Then calculate percentage growth using: (change ÷ base population) × 100. For example, a change of 10 in a base of 100 is 10%, but the same change of 10 in a base of 50 is 20%; this shows why the base matters. B is wrong because a base population is not normally zero, and division by zero cannot give a meaningful percentage. C is wrong because population and area are different quantities; area is used when calculating density. D is wrong because the role of a base population is to provide the denominator for comparison, not to determine whether the birth rate changes. Memory cue: percentage growth is always measured from the starting number.

Related tags

Base PopulationPercentage GrowthPopulation CalculationPopulation GrowthPopulationGeographyClass 9 Mcq

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